tuutseyoo tuutseyoo

23-01-2018
Mathematics

contestada

a collection of dimes and quarters total cost $3.55. There are 25 coins in all. how many quarters are there?

Respuesta :

texaschic101 texaschic101

23-01-2018

d + q = 25.....d = 25 - q
0.10d + 0.25q = 3.55

0.10(25 - q) + 0.25q = 3.55
2.50 - 0.10q + 0.25q = 3.55
-0.10q + 0.25q = 3.55 - 2.50
0.15q = 1.05
q = 1.05 / 0.15
q = 7 <=== there are 7 quarters

d + q = 25
d + 7 = 25
d = 25 - 7
d = 18.....and 18 dimes

Answer Link

Otras preguntas

HELP PLEASE YEAH YEAH

Label the parts of this simple sentence by writing subject or predicate in the spaces below each part.

Read the excerpt from Julius Caesar, act 2, scene 4. SOOTHSAYER. None that I know will be; much that35 I fear may chance. Good morrow to you. Here the street is

5. You are running at your maximum speed of 6m/s to catch a bus which isstanding at the bus stop. The bus move off with an acceleration of 1m/s whenyou are 20 m

solve using substitution x^2 -4x+20=0

Please help me please:(

Answer the question on the screen, “What type of bond is this combination likely to form?”

PLEASE PLEASE any help i am struggling

Given the two dilated figures, what is the length of AB

Two trains, Train A and B, weigh a total of 251 tons. Train A is heavier than train B. The difference of their weights is 181. What are the weights of each trai